Brand color

Substack Accent

#ff6719

hex#ff6719

rgbrgb(255, 103, 25)

hslhsl(20, 100%, 55%)

oklchoklch(0.698 0.201 42.2)

From Substack brand colorsRelative luminance 0.3103

Warm Vivid Playful Bold

Open in palette tool Check contrast

Substack Accent on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 5 public brands that use it and the palettes it appears in.

Tints & shades

Tints — toward white

ff742e ff8547 ff925c ffa070 ffb18a ffbe9e ffccb3 ffdac7 ffebe0 fff8f5

Shades — toward black

ff5500 e64c00 cc4400 b33b00 993300 7a2900 612000 471800 2e0f00 140700

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

ff6719 1ab2ff

#1ab2ff

Analogous

Open in tool →

ff6719 ff1a40 ffd91a

#ff1a40 · #ffd91a

Triadic

Open in tool →

ff6719 1aff66 661aff

#1aff66 · #661aff

Split-complementary

Open in tool →

ff6719 1affd9 1a40ff

#1affd9 · #1a40ff

Tetradic

Open in tool →

ff6719 40ff1a 1ab2ff d91aff

#40ff1a · #1ab2ff · #d91aff

Contrast

Substack Accent as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.91:1	fail	fail	fail	AA: use #d14600 as the text (4.58:1) AAA: use #9e3500 as the text (7.09:1) AA: or shift the background to #303030 (4.53:1) AAA: or shift the background to #030303 (7.08:1)
Aaon black	7.21:1	pass	pass	pass	Passes AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with Substack Accent as the background.

Brands using this color

Palettes built around it

ff6b35 ffd166 06d6a0 ffffff 1f1f1f

Fresh Juice

Open in tool →

Orange, mango and mint — a sugar rush; keep the type black so it stays legible under all that color.

Playful Vivid LightFood

Fonts for this mood

Substack Accent reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

Warm fonts →Playful fonts →Bold fonts →

mcpConnect your agent — build around Substack Accent

live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp

claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp

try this prompt

›analyze #ff6719 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff6719-c4ae9c-62cbbb-2d2a1f-f1e9eb?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md